JP2009178554A - Device with pressure actuated piston for dispensing multiple syringe or multiple cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device, allowing a very simple repeated use of this arrangement for self-dispensing by patients and treating remote wounds, e.g. an arm or foot wound by the patient. <P>SOLUTION: The device includes a dispensing piston that is actuatable by a pressure medium for dispensing a syringe and a guide portion 3 within which the dispensing piston is displaceably supported. The device is designed for dispensing a double syringe and includes a handling portion 5 for receiving the pressure medium, the dispensing piston, and the guide portion as well as locking means 6 that are releasable by applying manual pressure to the handling portion 5 and are arranged on the handling portion 5 and operatively connected to locking means 35 provided on the dispensing piston 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a device having a dispensing piston which is moved by a pressure medium for dispensing from a syringe as described in the first part of claim 1.

  Such a syringe with a hypodermic needle is known from U.S. Pat. No. 2,565,081, the device described being a pressure spring-operated dispensing plunger and a guide for movably receiving the dispensing plunger. Part. The dispensing plunger is held in the tensioned position by the locking hook at the rear end, and when the locking hook is released, the plunger of the syringe is pressurized. During this operation, the spring extends only once.

  US-A-3702608 discloses a dispensing device having a portion containing a single syringe at the end opposite the dispensing port and a relatively complex dispensing mechanism.

  WO 99/37343 also discloses a dispensing device that can accommodate a single syringe and has a relatively complex release mechanism.

  In the field of wound treatment, in addition, aseptic dressing materials, liquids, pastes and gelatin covering normal wounds are also used in combination with other substances for wound sealing and healing and pain relief. Multicomponent materials are increasingly used for this purpose, but they must be combined and mixed before being applied to the wound. For this reason, for example, each component is accommodated in a double syringe and mixed by a static mixer or a spraying device before being applied to the skin or wound surface. Dispensing from the mixer is done by applying manual pressure to the plunger of the dual syringe.

  Especially for long-term patients and chronic wounds, wound treatment by the patient himself is not only desirable, but it also saves money. However, in conventional dual syringes, this dispensing operation requires the patient for force and some manual ability and should not be underestimated. Depending on the site of the wound, it is difficult for the patient to operate the dual syringe.

  Furthermore, it is desirable to be able to meter the components to be dispensed, which is not well guaranteed with conventional double syringes.

US-A-2565081 US-A-3702608 WO 99/37343

  Under such circumstances, the present invention further develops a device of the type mentioned at the beginning, which allows the use of multiple syringes and can be manufactured inexpensively while ensuring improved operability by the patient. Based on the purpose of.

  Another object of the present invention is that the device can be used repeatedly and that any dispensing volume can be accurately metered.

  These objects are achieved by the device according to claim 1, which is an independent claim. Further preferred embodiments of the invention are set out in the dependent claims.

  Hereinafter, representative embodiments of the present invention will be described in detail with reference to the drawings.

1 is an exploded view of a first exemplary embodiment of the device of the present invention for automatic dispensing of a double syringe. FIG. 2 is a perspective view of a hand grip portion of the apparatus shown in FIG. 1. The perspective view of the locking sleeve of the apparatus shown in FIG. FIG. 3 is a different perspective view of the locking sleeve shown in FIG. The perspective view of the assembly apparatus of the apparatus shown in FIG. FIG. 2 is a partial perspective view of the device shown in FIG. 1 with the dispensing piston in the tensioned position. The perspective view of the extraction piston shown in FIG. The fragmentary sectional view which follows the IV-IV plane of FIG. 2 which shows the locking position of the extraction | pouring piston in a tension | tensile_strength position. The fragmentary sectional view which follows the IV-IV plane of FIG. 2 which shows the releasing position of a locking sleeve. The perspective view of the 2nd representative example of this invention apparatus automatically dispensed with a double syringe. Sectional drawing in alignment with the VII-VII plane of FIG. Sectional drawing which follows the VIII-VIII plane of FIG. 6 with the extraction piston in the release position.

  In the following, in a representative embodiment, a dual syringe is illustrated and described, but multiple syringes or multiple cartridges having three or more storage containers are also included, in which case the dispensing piston is adapted. The The terms “front” and “rear” refer to the syringe outlet on the front side of the syringe.

  FIG. 1 shows a first embodiment of a dispensing device 1 according to the invention for a double syringe, which comprises a dispensing piston 2, a guiding part 3, a spring member 4 acting as a pressure medium, a gripping part 5 and A locking sleeve 6 is included.

  1 and 3 has the form of a hollow cylinder 8, which has a front end 2a closed by a plunger support 9 and a rear end 2b open. A finger hook 7 is provided at the front end 2 a of the outer peripheral surface of the dispensing piston 2, its lower side extends along a part of the circumference of the hollow cylinder 8, and the upper plane is the fact relative to the peripheral surface of the hollow cylinder 8 It extends at a right angle. The finger hook 7 can be inserted and mounted in the positioning slot 10 of the hollow cylinder 8 as seen in FIG. 1 and will be described in more detail in the following description. Serrated locking teeth 35 are formed along the lower side of the dispensing piston 2. The locking teeth 35 are formed over a size range equal to the entire stroke length of the dispensing piston. At the position of the extraction piston 2 shown in the figure, the foremost tooth groove 35 a of the locking tooth is opposed to the axial range of the locking hook 30. The inner part of the locking hook part 30 has the same shape as the tooth groove, so that the locking hook part 30 can be surely engaged in any one tooth groove 35.

  As can be seen in FIG. 1, the guide part 3 consists essentially of a hollow cylinder 12, the open end 3 b of which is adapted to receive the dispensing piston 2. An opening 13 is formed in the peripheral surface of the hollow cylinder 12, and this opening 13 extends in the longitudinal direction over most of the guide portion 3, and its width is a finger hook portion attached to the dispensing piston 2. The hollow cylinder 12 is adapted to receive the double plunger 55. In this manner, the extraction piston 2 can be moved in the axial direction within the guide portion 3 while the finger-hanging portion 7 is projected from the opening 13. The front stopper shoulder portion 34 for the locking sleeve 6 is defined by the width of the transverse wall portion 14 along a part of the outer periphery of the guide portion 3.

  The movement of the piston in the guide part 3 is limited by the syringe receiving flange 15 at the front end 3a of the guide part 3. This syringe receiving flange 15 has the shape of a lateral wall, extends on both sides beyond the cylinder diameter, is formed with a U-shaped recess in the central portion, and the double syringe 50 and The double plunger 55 can be inserted. At the upper edge of the positioning flange 15 is formed an insertion opening 16 for the flange of the dual syringe as seen in FIG. Therefore, during the operation of the double plunger 55, the front end position of the dispensing piston 2 in the guide portion 3 is the end position of the double plunger in the double syringe.

  The spring member 4 is formed of a compression spring that is spirally formed into a cylindrical shape. A front end 4 a of the spring member 4 is disposed in the hollow cylinder 8, and a rear end 4 b protrudes from the opened rear end 2 b of the dispensing piston 2.

  FIG. 1 d shows the device of the present invention assembled with dual syringe 50 and mixer 53. The dual syringe is moved by a dual plunger 55 and further includes a holding flange 54 and a pressure plate 57.

  According to FIG. 1 a, the gripping part 5 also includes a substantially cylindrical surface structure 18, whose front end 5 a is open and whose rear end 5 b is closed by an end wall 19. In the front portion, the hollow space of the gripping portion 5 is wide from the position of the stopper rod 20 extending in the circumferential direction along the inner wall.

  The step stopper rod 20 forms a receiving portion 33 at the front portion of the grip portion 5 that is shaped so as to receive the rear end portion 3 c of the guide portion 3 and the rear end 3 b abuts against the step stopper rod 20. Positioning cams 21a and 21b are respectively arranged on two opposite sides of the inner wall of the front receiving portion 33, and they extend from the step stopper rod 20 toward the front.

  Accordingly, the rear end portion 3c of the guide portion 3 is correspondingly provided with two positioning slots 22a, 22b, which ensures the correct orientation of the guide portion 3 when the guide portion 3 is inserted into the gripping portion 5. It is like that. Snap protrusions 23 a and 23 b are disposed on opposite side surfaces of the rear end portion 3 c of the guide portion 3. Corresponding snap grooves 24 a and 24 b are formed along the inner wall of the receiving portion 33. In this way, the assembly of the component members 3 and 5 forms a non-removable snap connection between the snap projections 23a and 23b and the snap grooves 24a and 24b.

  The cylindrical spring guide 25 is arranged in the center of the hollow space of the gripping part 5, extends in the axial direction over virtually its entire length and is connected to the end wall 19 inside. More specifically, the outer diameter of the cylindrical spring guide 25 is substantially equal to the inner diameter of the spring member 4. In this way, the cylindrical spring guide 25 guides the rear end 4b of the spring member 4 toward the inside of the end wall 19, whereby the spring member 4 is compressed when the components 2 to 5 are assembled.

  A rear stopper shoulder portion 26 is disposed along the circumferential surface of the cylindrical surface structure 18 and protrudes in the circumferential direction behind the receiving portion 33. In particular, the stopper shoulder portion is disposed at the front end position of the end portion 5 c of the grip portion 5.

  According to FIGS. 1 b and 1 c, the locking sleeve 6 has an annular sleeve housing 27, which can slide over the front end portion 5 c of the gripping portion 5. Furthermore, the sleeve casing 27 is given a slightly oval inner diameter as compared with the outer diameter of the end portion 5c, and the longer diameter is located between the locking hook portion and the finger hook portion, and corresponding displacement is caused. enable. After assembly, the front face 28 of the locking sleeve 6 is locked to the front stopper shoulder 34 of the guide part 3. In this state, the rear end 6 b of the locking sleeve 6 contacts the rear stopper shoulder portion 26 of the grip portion 5.

  A locking hook portion 30 is disposed along the inner wall surface of the sleeve surrounding wall 27, and the locking hook portion 30 extends radially inward. A side opening 32 corresponding to the locking hook 30 is formed in the front end portion 5 c of the grip portion 5. Since the inner diameter of the locking sleeve and the cylindrical surface 5c is elliptical, the locking hook 30 is moved to the side after the locking hook 30 is moved toward the side opening 32 when the components 5 and 6 are assembled. It can engage in the opening 32 and project into the hollow space of the gripping portion 5.

  According to FIG. 1 c, the elastic pressure member 31 is arranged on the inner wall surface of the sleeve housing 27 on the side opposite to the locking hook 30. In order to engage the locking hook 30 with the locking teeth, the pressure member 31 applies a force to the locking sleeve 6 in the direction opposite to the locking hook 30. On the outer side of the sleeve, the finger hook portion 29 is assembled to the elastic pressure member 31. By applying pressure to the finger hook portion, the elastic pressure member 31 and therefore the lock sleeve 6 together with the lock hook portion 30 are engaged within the range of radial play from the lock teeth 35 on the lower side of the dispensing piston 2. The combined state is released, and thereby the dispensing piston is released.

  4 and 5 are cross-sectional views taken along the planes IV-IV and VV in FIG. In the closed position of the locking sleeve 6 shown in FIG. 4, the finger hooking portion 29 is acted on by the pressure member, and is thus positioned away from the front end portion 5 c of the gripping portion 5 within the range of this play in the radial direction. In this position, the inner part of the locking hook 30 extends through the opening 32 into the internal space of the gripping part 5. Therefore, the lock hook 30 is engaged in a specific tooth groove of the lock teeth 35 of the extraction piston 2 extending along the inner wall surface of the grip portion 5. At the rear end of the dispensing piston 2 shown here, the locking hook 30 engages in the front locking tooth groove 35a. According to the locking means formed in this way, the dispensing piston 2 is held in the axial position relative to the gripping part 5 and resists the force applied by the spring member 4.

  In the unlocking position of the locking sleeve 6 shown in FIG. 5, the finger-hanging portion 29 is at a position applied by hand pressure, and at this position, toward the front end portion 5c of the gripping portion 5 within a predetermined play range. It has been displaced. Therefore, the tooth-shaped inner part of the locking hook 30 is pulled out from the internal space of the gripping part 5, thereby releasing the locking means.

  When the manual pressing force applied to the cylindrical spring guide 25 is released, the locking sleeve 6 returns to the closed position shown in FIG. 4 by the spring action of the elastic pressure member 31. This engages the locking sleeve in the nearest tooth space. Therefore, the locking teeth 35 can stop the dispensing piston 2 at another piston position as required by the gripping portion 5.

  The pulling-back of the extraction piston 2 by hand is because the respective wedge shapes of the locking hook portion 30 and the locking teeth 35 enable the engagement of the locking hook portion 30 from the tooth gap toward the rear. By applying pressure to the finger placement surface 11 of the finger-hanging portion 7, it can be pulled back from any position.

  FIG. 6 shows a second exemplary embodiment of the dispensing device 40 according to the invention in a perspective view. The same features as in the first embodiment are indicated by the same reference numerals. In addition, a dual syringe 50 suitable for use with the dispensing devices 1 and 40 is also shown.

  This modification is basically the same as the representative first embodiment, and the main difference is that the simplified locking / release mechanism and the dispensing operation cannot be interrupted.

  The device 40 includes an elastic finger rest 36, the rear end 36 b of which is rigidly connected to the grip portion 5 at the rear end 5 b, and the grip portion 5 along the cylindrical surface 18. It extends forward to the front end 5a. A locking hook 37 is disposed at the front end 36 a of the finger hook 36. Here, the finger hook portion having the lock hook portion has substantially the function of the lock sleeve 6 in the dispensing device of the first embodiment. In this embodiment, as compared with the first embodiment, the locking hook 37 is directed outward.

  A locking notch 41 corresponding to the locking hook 37 is provided on the dispensing piston 2. The dispensing piston 2 has a positioning slot 10 at its front end, into which a finger hook 7 can be inserted. This finger-hanging part has a locking support 42 which extends in the shape of an umbrella above the hollow cylinder 8 of the dispensing piston 2. A lock notch 41 is formed below the lock support 42 (see FIG. 8).

  When pressure is applied to the pressing surface 38 of the finger hook portion 36, the lock hook portion 37 is pushed down and the engagement with the lock notch 41 is released. When the pressure applied by the hand is released by the spring arm shape of the finger hook portion 36, the lock hook portion 37 returns to the initial posture, but the wedge shape of the lock hook portion 37 is used when the device is reused later. Ensuring engagement in the rear position.

  7 and 8 show perspective views of the guide portion 3 in a tensioned state and a released state, presenting a section along the VII-VII plane and the VIII-VIII plane of FIG.

  From the description of the exemplary embodiments, various modifications can be devised by those skilled in the art without departing from the scope of protection of the present invention as defined in the appended claims. Thus, the locking teeth may be external locking means according to the second embodiment. In this case, the dispensing piston can be locked to the locking means at any time during the dispensing by simply releasing the pressing force by manual operation. Furthermore, a locking means including a locking hook portion on the dispensing piston 2 and a locking tooth on the grip portion 5 can be provided. The locking sleeve can be provided with external locking means in the form of locking hooks or the gripping portion can be provided with internal locking means in the form of locking brackets.

  Further, in order to facilitate automatic dispensing, a compressed air cartridge or other pressure medium can be used in place of the compression spring.

Claims (12)

A dispensing piston (2) that can be moved by a pressure medium (4) for dispensing the syringe, and a guide portion (3) in which the dispensing piston (2) is movably supported. In an apparatus including:
A multiple syringe (50) or multiple cartridge configured to receive and dispense, a gripping portion (5) for receiving a pressure medium (4), the dispensing piston (2), and the multiple syringe A guide part (3) having a receiving flange for
In addition, it can be released by applying manual pressure to the grip portion (5), and is disposed on the grip portion (5) and has locking means (35, 41) provided on the dispensing piston (2). Comprising a locking means (30, 37) operatively connected to the device.   The said pressure medium is a spring member (4), This spring member (4) is arrange | positioned in the said extraction piston (2), and protrudes from this extraction piston (2), 1. The apparatus described in 1.   Locking hooks (30, 37) at the outlet end of the gripping part (5) and at least one locking tooth on the dispensing piston (2) cooperating with the locking hooks ( 35. 41) A device according to claim 1 or 2, characterized in that the locking sleeve (6) comprises 35, 41).   4. Device according to claim 3, characterized in that the dispensing piston (2) has a plurality of locking teeth (35, 41).   The locking means includes a locking sleeve (6) disposed at an end on the outlet side of the gripping portion (5) and having a locking hook (30) in cooperation with the locking teeth (35). An apparatus as claimed in any one of claims 1 to 4, characterized in that it comprises.   An elastic pressure member (31) is provided on the inner side of the locking sleeve (6) opposite to the locking hook (30) to press the locking hook (30) against the tooth groove of the locking tooth. The locking means can be released by manually applying pressure to the outer surface of the area of the locking sleeve located on the opposite side of the locking hook. The apparatus according to claim 5.   At least one locking means (41) is arranged at the end of the elastic locking support (36, 42) extending in the longitudinal direction of the dispensing piston (2). The apparatus as described in any one of Claim 1- Claim 4.   The said extraction piston (2) has a finger hook part (7) for moving the extraction piston (2) by hand from the front position to the rear position at the outlet side end. Device according to any one of the preceding claims.   9. The gripping part (5) according to any one of claims 1 to 8, characterized in that it has a substantially cylindrical axially extending spring guide (25) inside. apparatus.   At least two opposing positioning slots (22a, 22b) in the rear end portion (3c) of the guide portion (3) and corresponding positioning cams (21a, 21b) in the inner wall of the gripping portion (5). 10. A device according to any one of claims 1 to 9, characterized in that it comprises a device.   A receiving flange (15) provided at the outlet side end (3a) of the guide portion (3) has a directivity so that the multiple syringe (50) or the multiple cartridge can be mounted with directivity. 11. The device according to claim 1, wherein the device is symbolized for multiple cartridges.   A device (1,40) according to any one of claims 1 to 11 and a pharmaceutical preparation characterized by a multiple syringe (50) insertable into the device (1,40). Dosing device.

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